Two trains 140 m and 160 m long run at the speed of 60 km/hr and 40 km/hr, respectively in opposite directions on parallel tracks. The time (in seconds) which they take to cross each other is?

  • A. 9 s
  • B. 9.6 s
  • C. 10 s
  • D. 10.8 s

Correct Answer: 10.8 s

Required time =DistanceSpeed=300(2509)=(300×9250)sec=545sec=10.8sec

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